Shaikh Muqbil rahimahullah said quoting an-Nihiyah of Ibnul-Atheer:” that is: being fast/quick while walking” [as-Saheeh ul-Musnad (no. 232)
Full hadith:
Jabir bin Abdillah reported that the people complained to the Prophet (may peace and blessings be upon him) so he called them and said:
عليكم بالنسلان
Upon you is walking fast
So we walked fast and we found it (the travel) lighter upon us”
Translated by
Faisal Ibn Abdul Qaadir Ibn Hassan
Abu Sulaymaan